Melting heat transfer of a non-Newtonian phase change material in a cylindrical vertical-cavity partially filled porous media
- Resource Type
- Authors
- Kasra Ayoubi Ayoubloo; Ahmad Hajjar; Mohammad Ghalambaz
- Source
- International Journal of Numerical Methods for Heat & Fluid Flow. 30:3765-3789
- Subject
- Materials science
Natural convection
Applied Mathematics
Mechanical Engineering
Enclosure
02 engineering and technology
021001 nanoscience & nanotechnology
Phase-change material
Finite element method
Non-Newtonian fluid
Computer Science Applications
Metal
020303 mechanical engineering & transports
0203 mechanical engineering
Mechanics of Materials
visual_art
visual_art.visual_art_medium
Composite material
0210 nano-technology
Porosity
Porous medium
- Language
- ISSN
- 0961-5539
Purpose This paper aims to investigate melting heat transfer of a non-Newtonian phase change material (PCM) in a cylindrical enclosure-space between two tubes using a deformed mesh method. Design/methodology/approach Metal foam porous layers support the inner and outer walls of the enclosure. The porous layers and clear space of the enclosure are filled with PCM. The natural convection effects during the phase change are taken into account, and the governing equations for the molten region and solid region of the enclosure are introduced. The governing equations are transformed into non-dimensional form and then solved using finite element method. The results are compared with the literary works and found in good agreement. The non-Newtonian effects on the phase change heat transfer and melting front are studied. Findings The results show that the increase of non-Newtonian effects (the decrease of the power-law index) enhances the heat melting process in the cavity at the moderate times of phase change heat transfer. The temperature gradients in porous metal foam over the hot wall are small, and hence, the porous layer notably increases the melting rate. When the melting front reaches the cold porous layer, strong non-linear behaviors of the melting front can be observed. Originality/value The phase change heat transfer of non-Newtonian fluid in a cylindrical enclosure partially filled with metal foams is addressed for the first time.